Envelop.



PATENTE@ AUG. w65.

WILSON.

APPLIOATIQN 211.21) AER. 22,'1e04.

g2 @63134 @Visana of l \'ings, State of 1N ,certain new,and 'useful'Iniproveincnts'in En-v velops, of whichtlie following is a specifica- UNITED STATES @TENT oEElioE.

,RoBERriL "WILSON, V"oF ,NEW YORK, .N. v

ENvLofP.

iro. 767,337. Y

Specification ofLetters Patent; Patented. Aug, 15, 1905, Application ned' iip'rii 22,1901, `einem'.204,318.' r

Taiallfwz/nmf if iimg/ erinnern.:

- fle it known that I, ROBERT M.-.\YILsoN, a citizen of theUnited States, residing in the boroiigli of Bi'ooklyin'cityof vNew York, county4 ew York, have invented tior i,'refei'ence being. had to the accompany- Figure l is an inside face view ot the blank fronijwlncli ni)v improvedl envelop is made.

'Fig. lis the' reverse face of the envelop folded and sealed; Fig. 3, a longitudinal' section of Fig.'2t'o`show the relation of the end,v

fia-ps; and l `ig.t shows the reverse face oan' envelop, the end flap being tornopen, the

covered voutlines ofthe fia iisshown dotted, v M?" invention relates tu envelops, andin'ore pip'ticularlivv to that forni offenvelops where a portion thereof is perforated along 'eert-ain alines, whereby xt niay be -easily opened with.

out irregularly tearing or marring the envelop or damaging the contents.

. folriiiivliiclifj inny lie entirely-opened in one 'metionivhi'cli'may be made on the Apresent envolop-maclimes with onLv'sligl'it changes in the-forni of. tlieblank, which is iiiade in-one ,i ofiusiiigextra' pieces of l material, and which is sosiinpl'ein ai'i'angenientkt-hat it ma v be Aused with no additional expense in the making of the cheapest g 'ade of envelopsas well as the lineSt. i

BC, the top (iisealing flap l'), arid the betteln HaplL'allniade fi-oni' one:Y piece or blank.`

The ilapD'is off4 the ordinary forni and proyvided '\vith the niiicilage-gi'immed,margin a'.

'.llie 'iiapdi is approximately ofthe ordinary forin.` i

ln the coin'mon forni of envelop the flap C woiild'be 'of tlie'sanie sliape as the other end Hap ;'but in the blank vof in v envelop this lla p (Y being smaller and used :is an openingreinforce as well =as to elose the end of tlieenvelop the lower llap E niust be so shaped asA todo the work of llap IC and to close the ieniaiiider otlthat faire of tlieenvelop. 'lotliat end the (lap E is niiide with an inclined edge v of about the saine roiitour'as that of an o'r-v I kobject-is,yto. provide anenvelop o f 'I this dinaryenvelop, butl carried beyond the Annu-l dle in a flattened curve e3 to its junction with This edge e* is a eonthe straight edge L x l tinuation ot theedge line of the envelop after itis folded. The fiap lE at itsA widest part is of the same width as the envelop, and thus en-` tirely covers the reinforce or opening a'p C.

e arc-two y lines rof perforations which- 1 ivith the end il* iiiclose a tiiaiigularspaCe o n the end of flap E, the portions f7 of tlie iiap. thusinclosed performing a function to ,lie-

laterL described. -'llieapex othis triangular i ligure is formed by aeiirved or angular slit e-and vthe space incloscdwitli'intheabovef described triangular ligure is coated withniu' preferably of the samelsii/.e as the triangular portion 1", so that when-tlieenvclopis folded,fp as in Fig;A Q, tlie edges of tlieliiapj()willfsubr'f-` stantially coincide with t.

tiens er and Slit t [n niakingup the,

cnveloptl over pntlieni, l paste I lioldinggitto tlief Hap-B of' the triangular".portion e' bei 'triangulaill'ap C,

,iia'ps being 'shown -in dotted linesiii 'Fig'.v -1.

So'olded and sealed 'therenvelop is. of the same formas any ordinary envelop, but differs therefrom in the fact tliat'tlie end tlap C is entirely pasted'to the bottoni flap E instead of only along the margin. y .f Thefunctionof the slityis to forma tongue 1 which may l'ie graspedby the tingersto open tli'e end of the envelop on the line ofthe porforations ff". In fig. Q PI have shown 'the .tongue so formed iis projecting upwardly. i

havesliown it tliiis'forthe sake o f drawing attention to its function; bnt'normally lsaid tongue does' not project beyond the plane' off the paper, unless,tlieenvelop vbe bent transversely about on, a yline witlifsaid tongue.

'llien the tongue will project slightlyY and may v lie'i.,asily grasped. A tearing-action on the -tongue will now open the envelop along' the -linesof the perforatioiis u, thus opening the envelop, as shown in Fig. 4, and leaving a triangulaii'lap at one end of a double tliiek.- ness of paper. p v 'llie necessity-jef -pasting the Hap C lindercilage, guin,' or paste, (indicated bythe ietf."

' lines .ofpeiforaneath the triangular portion el is follows: If there was butfone thickness of thin paper forming .such triangular section, when the tongue was pulled the paper would tear from the base of the tonguealmost straight back' toithe edge einstead of :following theline of' the perforations. Thisisgierause-the direo.

tion of the applied force is net the same the direction of said perforations and the paper' tears in the 'line'ofdast resistance." By r6- inforcing it, however, the paper, has more ref sistance to tearing` strain than 'theperl rar' A tions and the tear follows the angular; line.

In addition-to this whenthe tongue is pulled the edge of' the' Hap C being immediately beneath the perforations acts asasevering edge to break the paper between them, thus making `it additionally'certain that atriangular and'regularly-shaped iiap of, full width will be opened out. Indeed, with very thin paper it would not be Aabsolutely'necessary to' have' the perforations e, as the edgeof the ap- C,

reinforced andinade stiff. by. being gummed to the flap E, would itself' eut 'the paper on the angular lines." It is to benoted in this connection that when -the flaps C and E are pasted Itogether the apex of fiapCcom'es just to the slit e and that therefore they apex of iiap C, as well as the apex of thetriangular portion e', forms. the opening-tongue, both' thicknesses of paper being grasped to' open theenvelop.

In order that the opening-flap may tear properly, following the cutting lines or perforations, it is necessary that the reinforcing l and cutting Hap be not gummed to the'body of the envelop beyond the tearing-lines, but

. be gummed tothat portion only of'the en- -of the envelop-body which is to form the base of the opening-flap and that the reinforce so given be beneath that part of the envelop which is to be torn open, else the tear or cut will not diverge to the corners of the envelop, but will be parallel to the line of applied force, and the edges of such reinforcing-Hap should extend back to the edge of the envelop which forms the base of the fiap in order that the cut may be regular along its.

entire length. Preferably the reinforcing cutting-flap is of a triangular shape, extendinglto the corners of the envelop, so that the envelop may be opened to its entire width.

The advantages of my improved envelop are obvious. It is easily opened at one motion of the hand, and the opening of it leaves -a protectingflap still attached-'to the envelop.-y 'The opening of the envelop does not tear' away.'v `any portion. Thus there is no danger of the' 'contents being injuredor torn. The openin made by severing the'fiap is of the full widt 4of the envelop anddoes not 'requireto be made larger in order to get out 'the'contents `A particular and important advantage lies in the fact that the blank is in one piece only', voi a shape easily formed,-,necessitating no material changes' in the ordinary .envelop-l makingfmachifnes, and' 'requiring the addition i .ofno supplementary and extra reinforcing.' or cutting pieces in Aorder to make it opera-- tive and complete. Again', the gumming is all on one side of-fthe'blank, as in ordinary I envelope, thus making it practicalto manu-A facture with machines already in the marketl While I havesh'own the blank'as 'adapted to an oblong envelop andlon whose-end it is desired to open, it will' be obvious thatthe A principle of my invention maybe appliedasv vwel-l to envelope of other shapes and to'iiaps -opening on any other ofthe four sides. Also it will -be understood that the -exaetfigure given tothe 'various flaps may be varied without'departing therefrom. f y Having described my 'in vehtiom'.v what 'I edges, and a. .covering-flap turned in from another of its side edges, the said reinforcing cutting-flap lying wholly beneath that portion 'A of the envelop designedto be torn open, andA V 1-vAn envelop havinga reinforcing out? tingfiap made in one piece with the body of u the envelop and turned in 4from lone of its side the said covering-flap being provided: within -f slit whereby the reinforcingeutting-flap may'l be grasped, substantiallyas described.

2. An envelop having a reinforcing cut ting'fiap made'in one piece therewith, and a covering-'flap dapted to be folded over upon the said cuttihgfa the said cutting-ap lying wholly heneat that portion of the covering-Hap designed to be torn open andbeing'l' l gummed thereto, andthe said-covering'ap having perforations coincident with the edge of the cutting-Hap and a-slit whereby the cutting-flap may begrasped, substantially as dlevv scribed.

3. An envelop-blank having asealin-gl-apfi... j.

with a gummed inside margin, triangular flaps at the ends of the blanks, and a bottom Hap, said bottom flap being gummed on one side margin for engagement with one of the side Haps and having a triangular gummed portion on its rinside face adapted to cover and be gummed to the other of the end flaps, said bottom flap having a slit forming the apex of the triangular gummed portion, substantially as described.

ROBERT M. WILSON.

Witnesses:

'W. H. RUBY, E. B. WRIGH'L 

